Adjustable high-precision nuclear-grade pressure switch

Abstract

The invention discloses an adjustable high-precision nuclear-grade pressure switch, and belongs to the technical field of pressure switches, and the pressure switch comprises a pressure switch which is communicated with a pipeline through a threaded interface; the sensing assembly communicates with the end, away from the pipeline, of the threaded connector; the auxiliary induction assembly is connected to the induction assembly; the automatic adjusting assembly is slidably connected into the threaded connector, one end of the automatic adjusting assembly is fixedly connected with the filter screen, and the other end of the automatic adjusting assembly is rotationally connected to the surface of the sensing assembly through the one-way assembly. The filter screen is installed in the threaded connector of the pressure switch, the filter screen can physically intercept pollutants in fluid media, and the impurities are prevented from blocking the spring tube and disturbing the action of the pressure switch. Meanwhile, the sliding rod can pull the filter screen to periodically vibrate upwards in the threaded connector, impurities and dust on the surface of the filter screen can be vibrated off, the precision of the pressure switch is automatically adjusted, and the effects of protecting and stabilizing the pressure switch and prolonging the service life of the pressure switch are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure switches, and more particularly to an adjustable high-precision nuclear-grade pressure switch. Background Art

[0002] Nuclear-grade pressure switches are key safety devices dedicated to nuclear power plants or other nuclear facilities, used to monitor and control the pressure of fluids (such as coolants, steam, or gases) to ensure that the system operates within a safe range.

[0003] Currently, the nuclear-grade pressure switches on the market still have the following defects when in use: Since the monitored fluid often contains incompletely reacted substances, catalysts, impurity particles, etc. The accumulation of impurities on the surface or in the gaps of the pressure sensing element will cause mechanical action lag or jamming and cannot accurately respond to pressure changes. Therefore, there is a need to provide an adjustable high-precision nuclear-grade pressure switch to solve the above problems. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the embodiments of the present invention is to provide an adjustable high-precision nuclear-grade pressure switch to solve the problems in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: An adjustable high-precision nuclear-grade pressure switch, comprising: a pressure switch, which is connected to a pipeline through a threaded interface, and a display screen and a dial are respectively installed on both sides of the pressure switch, and a filter screen is installed inside the threaded interface; An induction component, one end of which is connected to the end of the threaded interface away from the pipeline, and the other end is rotatably connected to the pressure switch through an indicating component, and is used to cooperate with the indicating component to monitor the pressure inside the pipeline; An auxiliary induction component, which is connected to the induction component and is used to rotate under the action of the induction component, and further assist in monitoring the pressure inside the pipeline; An automatic adjustment component, which is slidably connected inside the threaded interface, one end is fixedly connected to the filter screen, and the other end is rotatably connected to the surface of the induction component through a one-way component. When the induction component rotates, the automatic adjustment component deforms to absorb kinetic energy, causing the filter screen to move inside the threaded interface, realizing automatic cleaning of the dust on the surface of the filter screen, and thus automatically adjusting the accuracy of the pressure switch.

[0006] As a preferred technical solution of the present invention, the induction assembly includes: a bourdon tube with its end connected to the side of the threaded interface; a rotating shaft rotatably connected inside the pressure switch, with a sector gear mounted on its surface; an extension bracket with one end connected to the sector gear and the other end hinged to the end of the bourdon tube through a connecting rod; and a rotating rod rotatably connected to the center of the pressure switch, with a rotating rod gear mounted on the surface of one end, and the rotating rod gear and the sector gear are meshed and connected.

[0007] As a preferred technical solution of the present invention, the bourdon tube is oval.

[0008] As a preferred technical solution of the present invention, the indication assembly includes: an L-shaped bracket fixed to the end of the rotating rod away from the rotating rod gear, with a rotating rod rotatably connected to the other side of the L-shaped bracket; a bracket fixed to the inner wall of the pressure switch, with a face gear fixed to its end; a rotating rod gear mounted on one end of the rotating rod, and the rotating rod gear and the face gear are meshed and connected; and a multi-faceted indicating tube fixed to the end of the rotating rod away from the rotating rod gear.

[0009] As a preferred technical solution of the present invention, the auxiliary induction assembly includes: a C-shaped rheostat fixed to the side of the pressure switch away from the L-shaped bracket; a conductor bracket fixed to the surface of the rotating rod, and the side of the conductor bracket is slidably connected to the surface of the C-shaped rheostat; a controller fixed to the inner wall of the pressure switch, and the controller is connected to the ends of the C-shaped rheostat and the conductor bracket through wires respectively.

[0010] As a preferred technical solution of the present invention, the automatic adjustment assembly includes: a variable-diameter wheel rotatably connected to the surface of the rotating rod through a one-way assembly, with a misaligned groove provided on the variable-diameter wheel; a sliding rod with one end slidably connected inside the threaded interface and the other end fixed with a support bracket; a roller rotatably connected to the end of the support bracket, and the surface of the roller is in rolling connection with the variable-diameter wheel; and an elastic member connected between the support bracket and the threaded interface.

[0011] As a preferred technical solution of the present invention, the one-way assembly includes: a fixed block connected to the surface of the rotating rod, with a pawl rotatably connected to the fixed block, and the pawl is connected to the surface of the rotating rod through a pawl spring; a pawl groove provided on the variable-diameter wheel, and the end of the pawl is snap-fitted inside the pawl groove.

[0012] The embodiment of the present invention has the following beneficial effects compared with the prior art: When the pressure switch of the present invention is in use, the multi-faceted indicating tube will rotate and self-rotate on the surface of the scale disk, so that the pressure change inside the pipeline can be converted into obvious rotation angles and color changes of the multi-faceted indicating tube on the scale disk, providing a multi-channel way to read the pressure value of the pressure switch, and the ways of reading the pressure inside the pipeline by the scale disk and the display screen respectively can confirm each other, preventing the normal monitoring of the pipeline from being affected due to the damage of a certain reading method.

[0013] In the present invention, a filter screen is installed inside the threaded interface of the pressure switch. The filter screen can physically intercept pollutants in the fluid medium, preventing these impurities from clogging the bourdon tube and interfering with the operation of the pressure switch. At the same time, the sliding rod will pull the filter screen to vibrate upward periodically inside the threaded interface, so that the impurities and dust on the surface of the filter screen can be shaken off, and the accuracy of the pressure switch can be automatically adjusted, achieving the functions of protecting the pressure switch, stabilizing it and extending its service life.

[0014] To more clearly elaborate on the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of an adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0016] Figure 2 is a schematic diagram of the structure of the indicating component of the adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0017] Figure 3 is a front view of one side of the adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0018] Figure 4 is a front view of the other side of the adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0019] Figure 5 is a schematic diagram of the structure of the sensing component of the adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0020] Figure 6 is a partial enlarged view of part A in Figure 5.

[0021] Figure 7 is a partial enlarged view of part B in Figure 6.

[0022] Figure 8 is a schematic diagram of the internal structure of the threaded interface provided in an embodiment of the present invention.

[0023] Reference numerals: 1, pressure switch; 10, display screen; 100, dial; 11, threaded interface; 111, filter screen; 12, pipeline; 2, induction assembly; 21, bourdon tube; 22, rotating shaft; 23, sector gear; 24, extension bracket; 25, connecting rod; 26, rotating rod; 27, rotating rod gear; 3, indicating assembly; 31, L-shaped bracket; 32, bracket; 33, face gear; 34, rotating rod; 35, rotating rod gear; 36, multi-faceted indicating tube; 4, auxiliary induction assembly; 41, C-shaped rheostat; 42, conductor bracket; 43, controller; 44, wire; 5, automatic adjustment assembly; 51, variable diameter wheel; 52, offset groove; 53, support bracket; 54, roller; 55, sliding rod; 56, elastic member; 6, one-way assembly; 61, fixed block; 62, pawl; 63, pawl groove. Detailed implementation mode

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0026] Referring to FIGS. 1 to 8, an adjustable high-precision nuclear-grade pressure switch includes: A pressure switch 1, the pressure switch 1 is connected to the pipeline 12 through a threaded interface 11, and a display screen 10 and a dial 100 are respectively installed on both sides of the pressure switch 1, and a filter screen 111 is installed inside the threaded interface 11; An induction assembly 2, one end is connected to the end of the threaded interface 11 away from the pipeline 12, and the other end is rotatably connected to the pressure switch 1 through an indicating assembly 3, and is used to cooperate with the indicating assembly 3 to monitor the pressure inside the pipeline 12; An auxiliary induction assembly 4, connected to the induction assembly 2, is used to rotate under the action of the induction assembly 2, and further assist in monitoring the pressure inside the pipeline 12; An automatic adjustment assembly 5, slidably connected inside the threaded interface 11, one end is fixedly connected to the filter screen 111, and the other end is rotatably connected to the surface of the induction assembly 2 through a one-way assembly 6. When the induction assembly 2 rotates, the automatic adjustment component 5 deforms to absorb kinetic energy, so that the filter screen 111 moves inside the threaded interface 11, realizing automatic cleaning of the dust on the surface of the filter screen 111, thereby automatically adjusting the accuracy of the pressure switch 1.

[0027] In one embodiment of the present invention, as shown in FIGS. 4 and 5, the sensing assembly 2 includes: A bourdon tube 21, the end of which is connected to the side of the threaded interface 11; A rotating shaft 22, rotatably connected inside the pressure switch 1, and a sector gear 23 is mounted on the surface; An extension bracket 24, one end of which is connected to the sector gear 23, and the other end is hinged to the end of the bourdon tube 21 through a connecting rod 25; A rotating rod 26, rotatably connected to the center of the pressure switch 1, and a rotating rod gear 27 is mounted on the surface of one end, and the rotating rod gear 27 is meshed with the sector gear 23.

[0028] In this embodiment, when installing the pressure switch 1, the threaded interface 11 is rotated into the interior of the pipeline 12 to fix the installation of the pressure switch 1. When the pressure switch 1 is in use, media such as gas and liquid inside the pipeline 12 enter the interior of the bourdon tube 21 through the threaded interface 11. When pressure is applied to the interior of the bourdon tube 21, since the bourdon tube 21 is oval, a force tending to become round will be generated on the wall of the bourdon tube 21 under the action of the internal pressure. This force tending to become round causes the bent bourdon tube 21 to produce elastic deformation, making the bourdon tube 21 attempt to straighten.

[0029] When a displacement is generated at the free end of the bourdon tube 21 due to this straightening trend, the free end of the bourdon tube 21 will drive the connecting rod 25 to move. The connecting rod 25, through its connection with the extension bracket 24, causes the sector gear 23 to drive the rotating shaft 22 to rotate on the pressure switch 1. The sector gear 23 can drive the rotating rod 26 to rotate on the pressure switch 1 through the rotating rod gear 27. Thus, the rotating rod 26 can drive the indicating assembly 3 on the other side of the pressure switch 1 to rotate, so that the position indicated by the indicating assembly 3 on the scale 100 directly corresponds to the pressure value inside the pipeline 12.

[0030] In one embodiment of the present invention, as shown in FIGS. 2 and 3, the indicating assembly 3 includes: An L-shaped bracket 31, fixed to the end of the rotating rod 26 away from the rotating rod gear 27, and a rotating rod 34 is rotatably connected to the other side of the L-shaped bracket 31; A bracket 32, fixed to the inner wall of the pressure switch 1, and a face gear 33 is fixed to the end; A rotating rod gear 35, mounted on one end of the rotating rod 34, and the rotating rod gear 35 is meshed with the face gear 33; The multi-faceted indicating tube 36 is fixed to the end of the rotating rod 34 away from the rotating rod gear 35.

[0031] In this embodiment, while the rotating rod 26 rotates within the pressure switch 1, the rotating rod 26 drives the L-shaped frame 31 at its end to rotate synchronously. Thus, the L-shaped frame 31 drives the rotating rod gears 35 and the multi-faceted indicating tube 36 at both ends of the rotating rod 34 (the rotating rod 34) to rotate respectively through the rotating rod 34.

[0032] Since the rotating rod gear 35 rotates around the center of the face gear 33, the face gear 33 and the rotating rod gear 35 are always meshed and connected. Thus, the rotating rod gear 35 drives the rotating rod 34 to rotate on the L-shaped frame 31 under the action of the face gear 33, and then the rotating rod 34 drives the multi-faceted indicating tube 36 on its surface to rotate. The multi-faceted indicating tube 36 has a radially symmetric shape, and the structure of each face is the same, and the color of each face of the multi-faceted indicating tube 36 is different. Thus, when the multi-faceted indicating tube 36 rotates on the surface of the scale 100, the pressure value detected by the pressure switch 1 can be read through the position change and color change of the multi-faceted indicating tube 36 through multiple channels.

[0033] In an embodiment of the present invention, as shown in FIGS. 5 and 6, the auxiliary induction assembly 4 includes: A C-shaped variable resistor 41 is fixed to the side of the pressure switch 1 away from the L-shaped frame 31; A conductor frame 42 is fixed to the surface of the rotating rod 26, and the side of the conductor frame 42 is slidably connected to the surface of the C-shaped variable resistor 41; A controller 43 is fixed to the inner wall of the pressure switch 1, and the controller 43 is connected to the ends of the C-shaped variable resistor 41 and the conductor frame 42 respectively through wires 44.

[0034] In this embodiment, the conductor frame 42 and the C-type rheostat 41 respectively form a complete circuit through the wire 44 and the controller 43, and the controller 43 is electrically connected to the micro battery. When the rotating rod 26 rotates within the pressure switch 1, it can drive the conductor frame 42 to slide on the surface of the C-type rheostat 41. Since the resistance of the C-type rheostat 41 gradually changes during the process of the conductor frame 42 sliding on its surface, the current in the circuit also changes accordingly, and the generated current change will be transmitted to the controller 43. The controller 43 transmits the current change to the display screen 10, and the pressure value inside the pipeline 12 can be read through the display screen 10 on the surface of the pressure switch 1. When the controller 43 senses that the current change rises to the set upper limit (or lower limit), at this time, the controller 43 controls the alarm to issue an alarm through an electrical signal, realizing the protection function of the equipment and system. The ways of reading the pressure inside the pipeline 12 by the dial 100 and the display screen 10 can confirm each other, preventing the normal monitoring of the pipeline 12 from being affected due to the damage of a certain reading method.

[0035] In an embodiment of the present invention, as shown in FIGS. 6 and 8, the automatic adjustment assembly 5 includes: A variable-diameter wheel 51, rotatably connected to the surface of the rotating rod 26 through a one-way assembly 6, and a misalignment groove 52 is provided on the variable-diameter wheel 51; A sliding rod 55, one end of which is slidably connected inside the threaded interface 11, and the other end is fixed with a support frame 53; A roller 54, rotatably connected to the end of the support frame 53, and the surface of the roller 54 is in rolling connection with the variable-diameter wheel 51; An elastic member 56, connected between the support frame 53 and the threaded interface 11.

[0036] In this embodiment, a filter screen 111 is installed inside the threaded interface 11. The filter screen 111 can physically intercept pollutants in the fluid medium, prevent these impurities from blocking the bourdon tube 21 and interfering with the operation of the pressure switch 1, ensure that the pressure switch 1 can work reliably, accurately and stably, and extend the service life of the pressure switch 1.

[0037] When the rotating rod 26 rotates, it can drive the variable-diameter wheel 51 to rotate counterclockwise through the one-way component 6, so that the variable-diameter wheel 51 rolls on the surface of the roller 54. The roller 54 will be pushed by the support frame 53 under the extrusion of the variable-diameter wheel 51 to slide downward in the threaded interface 11. When the support frame 53 slides downward, it will compress the elastic member 56. At the same time, the sliding rod 55 will drive the filter screen 111 to slide downward inside the threaded interface 11.

[0038] When the roller 54 rolls to the position of the dislocation groove 52 on the surface of the variable-diameter wheel 51, at this time, the support frame 53 will pull the sliding rod 55 to vibrate upward in the threaded interface 11 under the elastic force of the elastic member 56. Thus, the sliding rod 55 pulls the filter screen 111 to vibrate upward inside the threaded interface 11. When the variable-diameter wheel 51 continues to rotate counterclockwise, the filter screen 111 will slide downward again inside the threaded interface 11. By cycling in turn, the filter screen 111 periodically vibrates upward in the threaded interface 11, and the impurities and dust on the surface of the filter screen 111 can be shaken off. Thus, the accuracy of the pressure switch 1 can be automatically adjusted, and the functions of protecting, stabilizing the pressure switch 1 and prolonging the service life of the pressure switch can be realized.

[0039] In an embodiment of the present invention, as shown in FIGS. 6 and 7, the one-way component 6 includes: A fixed block 61, connected to the surface of the rotating rod 26. A pawl 62 is rotatably connected to the fixed block 61, and the pawl 62 is connected to the surface of the rotating rod 26 through a pawl spring; A pawl groove 63, formed on the variable-diameter wheel 51, and the end of the pawl 62 is snap-fitted inside the pawl groove 63.

[0040] In this embodiment, when the rotating rod 26 rotates counterclockwise on the pressure switch 1, at this time, the pawl 62 is snap-fitted inside the pawl groove 63 under the action of the pawl spring. The rotating rod 26 can drive the fixed block 61 to rotate, and the fixed block 61 can drive the variable-diameter wheel 51 to rotate synchronously counterclockwise through the connection between the pawl 62 and the pawl groove 63; when the rotating rod 26 rotates clockwise on the pressure switch 1, at this time, the pawl 62 will compress the pawl spring under the extrusion of the pawl groove 63. Thus, the rotating rod 26 will not drive the variable-diameter wheel 51 to rotate clockwise, preventing the interference phenomenon between the dislocation groove 52 and the roller 54 when the rotating rod 26 rotates clockwise.

[0041] The working principle of the present invention is as follows: When the pressure switch 1 is in use, when the free end of the bourdon tube 21 generates a displacement due to this straightening tendency, the multi-faceted indicating tube 36 rotates on the surface of the dial 100, so that the pressure value detected by the pressure switch 1 can be read through multiple channels by the position change and color change of the multi-faceted indicating tube 36. When the rotating rod 26 rotates inside the pressure switch 1, it can drive the conductor holder 42 to slide on the surface of the C-shaped rheostat 41. When the controller 43 senses that the change in current rises to the set upper limit (or lower limit), at this time, the controller 43 controls the alarm to issue an alarm through an electrical signal, realizing the protection function of the equipment and system. The ways of reading the internal pressure of the pipeline 12 by the dial 100 and the display screen 10 can confirm each other, preventing the normal monitoring of the pipeline 12 from being affected due to the damage of a certain reading method.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection, an electrical connection or a connection that can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable high-precision nuclear-grade pressure switch, characterized in that, The adjustable high-precision nuclear-grade pressure switch includes: A pressure switch (1) is connected to a pipeline (12) through a threaded interface (11). A display screen (10) and a scale dial (100) are respectively installed on both sides of the pressure switch (1). A filter screen (111) is installed inside the threaded interface (11). An induction component (2), one end of which is connected to the end of the threaded interface (11) away from the pipeline (12), and the other end is rotatably connected to the pressure switch (1) through an indicating component (3), and is used to cooperate with the indicating component (3) to monitor the pressure inside the pipeline (12). An auxiliary induction component (4) is connected to the induction component (2) and is used to rotate under the action of the induction component (2), thereby assisting in monitoring the pressure inside the pipeline (12). An automatic adjustment component (5) is slidably connected inside the threaded interface (11). One end is fixedly connected to the filter screen (111), and the other end is rotatably connected to the surface of the induction component (2) through a one-way component (6). When the induction component (2) rotates, the automatic adjustment component (5) deforms to absorb kinetic energy, causing the filter screen (111) to move inside the threaded interface (11), realizing automatic cleaning of the dust on the surface of the filter screen (111), and thus automatically adjusting the precision of the pressure switch (1).

2. The adjustable high-precision nuclear-grade pressure switch according to claim 1, wherein The induction component (2) includes: A bourdon tube (21), the end of which is connected to the side of the threaded interface (11). A rotating shaft (22) is rotatably connected inside the pressure switch (1), and a sector gear (23) is installed on the surface. An extension bracket (24), one end of which is connected to the sector gear (23), and the other end is hinged to the end of the bourdon tube (21) through a connecting rod (25). A rotating rod (26) is rotatably connected to the center of the pressure switch (1). A rotating rod gear (27) is installed on the surface of one end, and the rotating rod gear (27) is meshed with the sector gear (23).

3. The adjustable high-precision nuclear-grade pressure switch according to claim 2, characterized in that, The bourdon tube (21) is oval.

4. The adjustable high-precision nuclear-grade pressure switch according to claim 2, wherein The indicating component (3) includes: An L-shaped bracket (31) is fixed to the end of the rotating rod (26) away from the rotating rod gear (27). A rotating rod (34) is rotatably connected to the other side of the L-shaped bracket (31). A bracket (32) is fixed to the inner wall of the pressure switch (1), and a face gear (33) is fixed to the end. A rotating rod gear (35) is installed at one end of the rotating rod (34), and the rotating rod gear (35) is meshed with the face gear (33). A multi-faceted indicating tube (36) is fixed to the end of the rotating rod (34) away from the rotating rod gear (35).

5. The adjustable high-precision nuclear-grade pressure switch according to claim 4, wherein The auxiliary induction component (4) includes: A C-shaped variable resistor (41) is fixed to the side of the pressure switch (1) away from the L-shaped bracket (31). A conductor bracket (42) is fixed to the surface of the rotating rod (26), and the side of the conductor bracket (42) is slidably connected to the surface of the C-shaped variable resistor (41). A controller (43) is fixed to the inner wall of the pressure switch (1). The controller (43) is connected to the end of the C-shaped variable resistor (41) and the end of the conductor bracket (42) through wires (44).

6. The adjustable high-precision nuclear-grade pressure switch according to claim 2, characterized in that, The automatic adjustment component (5) includes: The diameter-changing wheel (51) is rotationally connected to the surface of the rotating rod (26) through the one-way component (6), and a dislocation groove (52) is formed on the diameter-changing wheel (51); The sliding rod (55) has one end slidably connected inside the threaded interface (11), and a support frame (53) is fixed to the other end; The roller (54) is rotationally connected to the end of the support frame (53), and the surface of the roller (54) is in rolling connection with the diameter-changing wheel (51); The elastic member (56) is connected between the support frame (53) and the threaded interface (11).

7. The adjustable high-precision nuclear-grade pressure switch according to claim 6, wherein The one-way component (6) includes: The fixed block (61) is connected to the surface of the rotating rod (26), and a pawl (62) is rotationally connected to the fixed block (61). The pawl (62) is connected to the surface of the rotating rod (26) through a pawl spring; The pawl groove (63) is formed on the diameter-changing wheel (51), and the end of the pawl (62) is snap-fitted inside the pawl groove (63).

Images